Candidate
Number
Centre Number
Candidate Name
CAMBRIDGE INTERNATIONAL EXAMINATIONS
General Certificate of Education Ordinary Level
5038/3
AGRICULTURE
PAPER 3 Practical Test
MAY/JUNE SESSION 2002
1 hour 15 minutes
Candidates answer on the question paper.
Additional materials:
As listed in Instructions to Supervisors
TIME
1 hour 15 minutes
INSTRUCTIONS TO CANDIDATES
Write your name, Centre number and candidate number in the spaces at the top of this page.
Answer all questions.
Write your answers in the spaces provided on the question paper.
Use sharp pencils for your drawings. Coloured pencils or crayons should not be used.
INFORMATION FOR CANDIDATES
The intended number of marks is given in brackets [ ] at the end of each question or part question.
FOR EXAMINER’S USE
1
2
3
TOTAL
This question paper consists of 7 printed pages and a Supervisor’s Report.
SP (SC/SLC) S21865/2
© CIE 2002
http://www.xtremepapers.net
[Turn over
2
For
Examiner’s
Use
Answer all the questions.
Write your answers in the spaces provided.
1
You are provided with 25 leaves from the same plant.
(a) (i)
Using a ruler, measure in mm each of the 25 leaves at their widest point, as shown
in the diagram below.
measure
Record your results in Table 1.1 showing your counting in the tally column.
Table 1.1
width of leaf / mm
tally
number of leaves
10 to 19
20 to 29
30 to 39
40 to 49
50 to 59
greater than 60
[3]
(ii)
How many leaves are less than 40 mm wide?
..............................................................................................................................[1]
(iii)
Calculate the percentage of leaves that are less than 40 mm wide. Show your
working.
..............................................................................................................................[2]
5038/3/M/J/02
3
For
Examiner’s
Use
(b) Suggest two reasons why leaves from the same plant may have different widths.
1. .....................................................................................................................................
.........................................................................................................................................
2. .....................................................................................................................................
.....................................................................................................................................[2]
[Total : 8]
5038/3/M/J/02
[Turn over
4
2
AS1 and AS2 are two white powders that can be used for agricultural purposes. You are
going to identify these two powders using four tests and the information in Table 2.1.
Table 2.1
Ion
Test
Test result
ammonium ions
Add sodium hydroxide solution.
Warm carefully.
Ammonia produced on warming
turning damp red litmus paper
blue.
calcium ions
Add sodium hydroxide solution.
White precipitate, insoluble in
excess.
Add dilute acid.
Fizzing, carbon dioxide
produced, which turns limewater milky.
nitrate ions
Add sodium hydroxide solution,
then aluminium foil. Warm
carefully.
Ammonia produced on warming
turning damp red litmus paper
blue.
sulphate ions
Acidify with dilute hydrochloric
acid, then add barium nitrate
solution.
White precipitate.
carbonate ions
(a) Test 1
•
•
•
•
Place a small amount of AS1 and AS2 into separate, clean, dry test-tubes.
Label the test-tubes.
Add 4 cm depth of sodium hydroxide solution to each test-tube.
Record your results and conclusions in the table below.
Keep your mixtures for Test 2.
results
conclusions
AS1
AS2
[3]
5038/3/M/J/02
For
Examiner’s
Use
5
For
Examiner’s
Use
(b) Test 2
•
•
•
Warm each of the test-tubes from Test 1 carefully.
Test any gas produced with damp red litmus paper.
Record your results and conclusions in the table below.
results
conclusions
AS1
AS2
[3]
(c) Test 3
•
•
•
•
•
Place a small amount of AS1 and AS2 into separate, clean, dry test-tubes.
Label the test-tubes.
Add 3 cm depth of dilute hydrochloric acid to each of the tubes.
Test any gas produced with limewater.
Record your results and conclusions in the table below.
Keep your mixtures for Test 4.
results
conclusions
AS1
AS2
[3]
(d) Test 4
•
•
Add 3 cm depth of barium nitrate solution to each of the test-tubes from Test 3.
Record your results and conclusions in the table below.
results
conclusions
AS1
AS2
[3]
5038/3/MJ/02
[Turn over
6
For
Examiner’s
Use
(e) Suggest a use for AS2 and give a reason for your suggestion.
use ...................................................................................................................................
reason ..........................................................................................................................[2]
[Total : 14]
3
AS3 and AS4 are two samples of soil.
•
•
•
•
•
•
•
Plug the stem of a filter funnel with glass wool.
Fill the filter funnel with AS3 to the level shown in the diagram.
Mark the soil level on the funnel.
Use a clamp stand, boss and clamp to hold the filter funnel above a 100 cm3 measuring
cylinder.
Fill the rest of the funnel with water, being careful not to disturb the soil surface. Keep
the funnel full of water throughout the experiment.
Time how long it takes for 30 cm3 of water to enter the measuring cylinder.
Repeat the experiment using the same volume of AS4 in place of AS3.
beaker
water
water
filter funnel
soil
glass wool
measuring cylinder
5038/3/M/J/02
7
For
Examiner’s
Use
(a) Draw a table to show your results in the space below.
[3]
(b) Explain your results.
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[4]
(c) What characteristic would be necessary in a cultivar that was to be grown in soil AS3?
..........................................................................................................................................
..........................................................................................................................................
......................................................................................................................................[1]
[Total : 8]
5038/3/M/J/02
8
SUPERVISOR’S REPORT
*The Supervisor or Teacher responsible for the subject is asked to answer the following
questions.
1
Was any difficulty experienced in providing the necessary materials? Give brief details.
2
Did the candidate experience any difficulty during the course of the examination? If so, give
brief details. Reference should be made to
(a) difficulties arising from faulty specimens;
(b) accidents to apparatus or materials;
(c) any information that is likely to assist the Examiner, especially if this cannot be
discovered from the scripts.
Declaration to be signed by the Principal, and completed on the top script from the Centre.
The preparation of the Practical Test has been carried out so as to fully maintain the security of
the examination.
Signed..............................................................................................................................................
Centre Number ........................................................................ School...........................................
*Information that applies to all candidates need only be given once.
5038/3/M/J/02